<template>
  <div class="list" ref="wrapper">
    <div>
    <div class="area">
      <div class="title border-topbottom">当前城市</div>
      <div class="button-list">
        <div class="button-wrapper">
          <div class="button">{{city}}</div>
        </div>
      </div>
    </div>
    <div class="area">
      <div class="title border-topbottom">热门城市</div>
      <div class="button-list">
        <div @click="handleCityClick(item.name)" class="button-wrapper" v-for="item of hot" :key="item.id">
          <div class="button">{{item.name}}</div>
        </div>
      </div>
    </div>
    <div class="area" v-for="(item, key) of cities" :key="key" :ref="key">
      <div class="title border-topbottom">{{key}}</div>
      <div class="item-list">
        <div @click="handleCityClick(innerItem.name)" class="item border-bottom" v-for="innerItem of item" :key="innerItem.id">
          {{innerItem.name}}
        </div>
      </div>
    </div>
    </div>
  </div>
</template>
<script>
import Bscroll from 'better-scroll'
import { mapState, mapMutations } from 'vuex'
export default {
  name: 'CityList',
  mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper)
  },
  methods: {
    handleCityClick (city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations({changeCity: 'changeCity'})
  },
  props: {
    hot: Array,
    cities: Object,
    letter: String
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  },
  computed: {
    ...mapState(['city'])
  }
}
</script>
<style lang="stylus" scoped>
  @import "~styles/varibles.styl"
  .border-topbottom
    &:before
      border-color : #ccc
    &:after
      border-color : #ccc
  .border-bottom
    &:before
      border-color : #ccc
  .list
    overflow : hidden
    position : absolute
    top:1.58rem
    left :0
    right : 0
    bottom :0
    .title
      line-height : .54rem
      background : #eee
      padding-left : .2rem
      color : #666
      font-size : .26rem
    .button-list
      overflow : hidden
      padding: .1rem .6rem .1rem .1rem
      .button-wrapper
        float:left
        width: 33.33%
        .button
         margin: .1rem
         text-align :center
         border: .02rem solid #ccc
         padding : .1rem 0
         border-radius : .06rem
    .item-list
      .item
        line-height: .76rem
        padding-left : .2rem
</style>
